Vibration recorder



M Y 85 1934- F. MANTHEY t 1,957,895

VIBRATION RECRDER Filed June 5, 1929 2 Sheets-Sheet l May 8, 1934- F. MANTHEY VIBRATION RECORDER Filed June 5. 1929 2 Sheets-Sheet Jnoenfor.-

Patented May 8, 1934 UNITED STATES VIBRATION RECORDER Fritz Manthey, Berlin, Germany, assignor to |llhe Electric Tachometer Corporation, Philadelphia,

Application June 3, 1929, Serial No. 368,14()

In Germany N Claims.

My invention relates to a device for automatically recording the running or the movements of motor vehicles or other machines by means actuated by the vibrations of the vehicles or ma- 5 chines.

The object of the invention is generally to simplify and improve the device and to provide new means for shifting the stylus making the records on a dial divided into concentric circles after every twelve hours from one circle unto the other circle. Records made on concentric circles are clearer and are easier to perceive than the known records having the form of a spiral line.

These and other objects of my invention will be hereinafter particularly described by refern ence to the accompanying drawings showing by way of example an embodiment of the invention, and in which Figure 1 is a front elevation of the open cover parts arranged within,

Figure 2 is a Vertical cross section of the apparatus along the line A--B Figures 2a, 3, and 4 are vertical sectional views of different parts oi the device shown in Fig. 1.

Figure 5 is a plan view of the record sheet obtained by the device shown in the Figs. 1 to 4.

Figures 6 and '7 illustrate an elevation partly in section and a plane view respectively of a modified construction of the shifting means.

Figures 8 and 9 are corresponding views to Figs. 6 and 7 and show the shifting means in another position.

Figure 10 illustrates a plane view of the recording sheet as obtained when using the modified shifting means.

The cover 1 is connected by a hinge 2 to the bottom-part 3 attached in a suitable way to the vehicle or to the machine the movements of which are to be recorded. Within the cover 1 there is accommodated the clock-mechanism 37. On the square part 5 of the clock-spindle 4 is fitted a disc 6 to rotate therewith. The margin of the disc 6 forms a guide for the slide 7. The slide 7 carries a pawl 8 engaging ratchet teeth 9 on the edge of the disc 6 so as to lock the slide against movement in a reverse direction to the direction of the movement of the clock-hands. As Fig. 1 shows the rear of the clock the clockhands move in the direction indicated by the arrow.

To the cover 1 are fastened the axis 1G, 11 and 12. On the axis 10 is pivoted the twoarmed lever 13 provided at one end with the shoulder 14 and at the other end with the tooth 15. A spring 16 on the axis 10 tends to keep the tooth 15. constantly in engagement with the teeth 17 of the segment 17 pivoted on the axis 11. The segment 17 itself tends to swing to of the device as seen from the inside and of the ovember 11, 1928 the left of Fig. 1 owing to the spring 18 arranged on the axis 12.

Into the slot 19 of the segment 17 projects a pin 2G of the arm 21 so as to be free to perform small oscillations across the slot. The arm 21 and the arm 22 are fastened to the hub 23. To the arm 22 is fastened a plate spring 24 provided at its end with a stylus 26 coacting with the paper support 25. The hub 23 is arranged on the bush 27 revoluble on the axis 12. On the hub 23 is also pivoted the vibrator 28. The vibrator is suspended under an angle of about 45 to the vertical line and its weight is carried by the spring 29. The vibrator is pressed at its lower end by the spring 30 into irictional contact with the arm 2l or the hub 23 so that the arm 21 and the stylus oscillate with the vibrator in the limits allowed by the width of the slot 19. The exchangeable recording sheet projects between the writing implement v26 and the support 25. The recording sheet itself shows radial lines printed thereon indicating the hours and fractions of hours and thin concentric circles along which the stylus 26 marks the oscillations of the vibrator with thick lines. clamped between the square head 32 and the spring 33 which can be freely rotated on the round part of the clock-spindle 4. By rotating of the square head 32 by hand the dial or checking sheet 31 and the spring can be rotated while the spindle 4 remains at rest. By these means the checking sheet may be rotated by hand for the distance required in order to bring the time-line printed on the sheet and corresponding to the time just shown by the clock under the stylus 26.

In operation of the device the clock-spindle 4 rotates in the direction indicated by the arrow in Fig. 1 and carries with it the slide '7. After every full rotation the free end of the pawl 8 strikes against the two-armed lever 13 so as to disengage the tooth 15 from the sector 17. The shoulder 14 which has the form of a tooth enters the space between two teeth of the segment 1'? so as to allow the segment 17 to rock for one tooth to the leit. By this small rocking movement the writing implement 25 moves from one circle unto the succeeding circle of the checking sheet 3l forming therebetween a step, seen from Fig. 5. As soon as the pawl S moves out of contact with the lever 13 the tooth 15 moves in contact with the following tooth of the sector 1'? whereupon the operation repeats after every rotation.

On the disc 6 a stirrup 34 is pivoted. The stirrup 34 is adapted to lie flush on the disc 6 and to be used in raised positionfor wind-1 ing up the clock mechanism by turning it in a reverse direction to the arrow shown in Fig. 1. The disc 6 while being turned in this direction The sheet is carries with it the slide 7 until it strikes against the shoulder 14 of the lever 13 so to be retained in position while the rotation of the disc 6 is continued, the pawl 8 riding over the teeth 9 of the disc 6. This arrangement has the effect that the rst record-line on the checking-sheet begins on the same radial line as the `succeeding record-lines. There are twice as many teeth 17 on the segment 17 as checking .circles are to be recorded on the dial 31.

After the records on all circles are made and at any rate as a new checking sheet is introduced the lever 22 and the writing ,implement 26 are swung by hand outwardly whereby the tooth 15 rides over the teeth 17 of the segment 17. While the lever 22 is swungr outwardly the spring plate 24 carrying the writing stylus is raised by the leg 35 of a U-shaped member supported by the spring 36. Ey this means the stylus 26 is held apart from. the new recording sheet while it is being introduced into the apparatus. The other leg 35 of the U-shaped mei ber is longer than the leg 35 so that by closing of the cover 3 the leg of the member is depressed and the stylus 26 is again allowed to contact with the checking sheet 31.

The shifting means shown in Figs. 6 to 9 have instead oi the lever 13 swinging .in the plane of the record-sheet a bolt 37 movable vertically to the said plane. The bolt 37 is hollow and is guided by the pin 38 projecting into its bore. The spring 45 tends to keep the bolt 37 in its upper position. The plane 37 of the bolt is inclined so that the latter is depressed by the slide 7 rotating with the disc 6. |I'he bolt 37 forms a pivot for the two pawls 39, 40 which are free to swing between the stops 41, 42. The upper pawl 39 is held by the spring 43 constantly in contact with the stop 41. The lower pawl 4o has owing to the spring 44 the tendency to approach the stop 42.

While the disc 6 is rotating the bolt 37 remains in its upper position so long as it is out of contact with the slide 7. Both pawls abut the stop 4l because the spring 18 of the segment 17 is much stronger than the spring .44. But as soon as the bolt 37 becomes depressed by the slide 7 the upper pawl 39 engages the teeth of the segment 17 and the lower pawl 40 becomes free to be swung by the spring 44 against the stop 42, see Figs. 8, 9. The distance of the stops 41, 42 is so chosen that the freed pawl 40 comes underneath the next gap of the teeth of the segment 17. As the slide 7 continues to rotate with the disc 6 the bolt 37 moves upwardly and the pawl 39 comes .out .of engagement with the teeth of the segment 17. Now the segment 17 and the pawl 40 swing for one tooth in the direction of the arrow. In the first .embodiment .the segment swings every time successively twice for one tooth. The records produced by the modified shifting means are illustrated in Fig. 10, and it will be noted that they differ from those shown in Fig. 5 as no steps are to be seen between the successive recordcircles.

The pawl 39 allows the segment 17 to be swung in a reverse direction to the arrows indicated in Figs. 7 and 9 in order to bring the segment 17 by hand into its initial position.

vWhat I claim is:

1. In a vibration recorder having a record sheet rotated by clockwork, the combination of recording means, means controlling the position of the recording means, a pendulum oscillating the recording means, a pin and slot connection between the controlling means and the recording means and allowing the oscillations of the latter means, and rotating means acting after every rotation of the recording sheet upon the said controlling means to change the position of the recording means.

2. In a vibration recorder, having a clock-work, and means for securing a record sheet to be rotated by the clock-work, the combination of means for making records on the record sheet along circular concentric lines on the record sheet, a ratchet mechanism controlling the position of the recording means, a spring tending to move the ratchet mechanism for changing the position of the recording means, a pawl cooperating with he ratchet mechanism for retaining it in position, a second pawl adapted to swing with the ratchet mechanism for a fixed distance, and a member rotating with the record sheet and moving in succession the pawls in a direction axially of their pivot to alternately release and to stop the ratchet mechanism.

3. In a vibration recorder, having relatively Xed clock-work, and means rotated thereby for carrying a record sheet, in combination, a stylus cooperating with the record sheet, means mounting said stylus for movement transversely ci the path of movement of said carrying means, means urging said stylus transversely, means for holding said stylus in any one of a series ci positions along the transverse path, and for limited, freely swinging movement in any or" said positions, means for releasing said holding means once upon each rotation of said carrying means, whereby said stylus is advanced one step upon each rotation of said carrying means, `a pendulum. having a fixed pivot and means connecting said stylus to said pendulum for eiecting movement of said stylus by the vibratory impulses which are to be recorded.

4. In a vibration recorder, having a relatively iXed clockwork mechanism and means rotated thereby for carrying a record element, in combination, a pivot member, stylus-carrying means mounted on said pivot, positioning means for said stylus-carrying means mounted on said pivot and rigidly connected to said stylus-carrying means, vibration responsive driving means including a pendulum mounted on and positively connected to said pivot member, friction means connecting said pendulum to said stylus-carrying means for causing said stylus to be driven by said ico pendulum through said connecting means and work mechanism, a pendulum connected to said stylus for actuating the same and having an arcuate shape conforming to thc exterior shape of said clockwork mechanism and means mounting said pendulum in said casing substantially concentric and closely adjacent said clockwork mechanism.

FRITZ MANTHEY.

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